Temperature-controlling device.



A. HOESCH. TEMPERATURE CONTROLUNG DEVICE.

APPLICATION FILED MAH. 23 i918.

Patented July 23, 1918.

Lamm?.

STATES PATENT FFCE.

.ALFRED HOESCH, OF BRCOKLYN, NEW YORK, ASSIGNOR T CHARLES J. TAGLIABUE MANUFACTURING C0., OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

TEMPERATURE-CONTROLLIN G DEVICE.

Specification of Letters Patent.

Patented July 23, 1918.

rlginal application filed May 6, 1913, Serial No. 765,737. Divided and this application led March 23, 1918. Serial No. 224,155.

To all whom 'it may concern:

Be it known that l., Amazon Rensen, a .citizen ot' the United States, resident of the borough ot' Brooklyn, county ot' Kings, city and State of New York, have invented certain new and useful lmi'irovements in Temperature-Controlling Devices, of which the ollowing is a specification,

My invention relates to temperature controlling devices and more particularly to thermostatic temperature controlling devices and has for its object to control with a. single controllingy device a plurality ot' heat producing mediums for heating any given element or place. Heretot'ore separate controlling devices have been employed `for controlling each heating medium and great ditiiculty has been encountered in adjusting such separate devices` to secure a proper cooperation therebetwiun at the desired temperatures. This dillculty is occasioned by the fact that each'controlling device must be connected at different points with the element or place at which the temperature is to be regulated, so that said devices would,

devices. The particular object of my invention is to overcome these serious objections and difficulties by means ot' a simple and inexpensive construction which is absolutely reliable in action and which may be conveniently used in connection for instance with manufacturing processes, where it. is essential to change the controlling points often. A still t'nrther object ot mv improvement' is to provide a device ot' the charzmter 40 indicated which will perlorrnits ful'iclionsot controlling several heating mediums with any desired number ot' degrees ot' temperature intervening between each operation.

My invention will be t'ully described hereinaftcn and the 'features of novelty will be pointed out in the appended claims.

, This application is a division ot' another applic-ation tiled by me in the llnited States Patent Ollicc on or about May (3, 11H3, Serial Reference is to be had to the accompanying drawing which by way of example illustrates an application of my improvement and which represents a diagrannnatic view, partly in section of my invention arranged for connection with a calender roll, used for instance in rubber mills or the like.

Referring to the drawing 51 represents a conduit or pipe which is connected at one end for instance with the exhaust of an engine and at its end connnunicates for instance with the interior of a calender roll of any type tor instance such as used in rubber mills, whereby exhaust Steam is conducted to the said rolls through the pipe 51 to heat the same. An exhaust pipe is connected with the pipe 51 and communicates with the atmosphere, while another pipe 53 connects the pipe 51 with a boiler or other source ot' live or high pressure steam7 the pipe 521 communicating with the pipe 51 at a poin! beyond the connection with the exhaust pipe v A. valve 9 controls the exhaust pipe and has its stem 10 connected with a diaphragm located in a. diaphragm chamber 11, the said chamber heilig connected with a valve block l2 through the medium of a tube, 13. A spring 1-1 preferably surrounds the stem 10 and serves to return tbe valve S) to and maintain it in its open position under certain conditionsI olE the apparatus as will 'appear more clearly hereinafter. A similar valve 9 controls the pipe 53 and also has its stem 10 connected with a diaphragm 1n the diaphragm chamber 1l which latter 1s also connected by means ot' tube 13 with a valve block 12, a spring 14 being also provided for returning and maintaining the valve il to and in its open position at certain times. The two valveblocks Y1Q and 12 are carried by a support 27. and cach valve is provided with a valve chamber 15) and 19 respectivelywhich chambers communicate with the tubes 13 and 13 by means o'l' channels 18 and 18 respectively. Channels 221 and Q3 lead Jfrom said valve chambers 1l) and lil to tubes E24; and 24 which in turn are. connected in any suitable manner as for instance by means of the pipe 25 with a source ol com 'rods 22 :incl 22 respectively.

pressed. air or other Each valve lilocli i2 snel l2 is further provided with a screwtliieaded plug 32 having' anaxial passage i5 and '15a extending therethrougln said channels coii'iiiiunicating at their outer ends with the atmosphere and at their inner ends with the valve, chambers lil and i9, valve l5 and, lila 'being located at the inner eno ot' euch. passage. 'i5 and '15% 'Valves 20 and 20 are located in the chaiiihers lil and 19 and are connecte 'l with rods anni 22 extending through and beyond the passagesand 152" respectively, the Seial rods beingsn'ialler iii diameter than. the said passages so as not to i The support completely obstruct the saine.

V27 is provided with preferably ii'itegral anti iiprigllit lugs on which a lever 3l is pnT-A oteil :it 35, said lever extending in opposite directions from said pivot with its' opposite ends 3&3 and Bal-b over the ici-ee eiicls of the This lover 34 at an intermediate point carries a preferably screwthreadml adjustable projection 3G the one encl ot' which engages a iliaphragiii 3T locati-irl iii'cr closing` a diaphragm chainlier 3S which latter is connected h y uicaiis oit' a. tulle. 3!) with ahull yl() suitalily secured iii positionso as to cxteiul into the interior of the pipe 5i, the said hulli 40 heineu partially or entirel)Y filled with o suitable liquid or gaseous luifcl which susceptible to changes in temperature, the said bulli coiiiprisiiigi` what might lie termed ay sensitive iiiomlier. T he lever furthercarries a scalo plate -fll suitably graduated to indicate degrees of teniperature aiifl which cooperates willi a pointer@ securcil to the projection 3G whereliy ai'iiviaratus may he set to operate at pieileteriniiieil iemporatiires, the projection v236 being' fiieferahh/v proviileil with an anguiar hezul i3 for accommodating a suitable key 'or other instrument hy in'caiis of which the adjustment of the said projection aiul consequently the rlcvice nur);T he facilitated. A spring 4lihafi its one curl, in engagement with the support 27 aiiil preferably*surrounds a pin thereon ancl has its other enel abutting against a screw 4G locatcrl on the lever 3%-, the said spring` i-'l serif'iiig` to iiiaintaintlio cnoi of the projectioii always in contact .with the diaphragm '37. By 'inafi'iipulating the screw -tG the tension off the spring` 4,4, may he iviroperly adjusted. if (les sireil a cover 47 having; a transparent por liioii #i8 may he secured upon the support Q7 so as to protect the otherwise exposed. parts of the thei'inosl'atic controller, a suitable opening i9 being iii this case provided in the transparent portieri -li ior perniittiiig;` access lo the angular hoafjl 43 of the projection Bil.w ln vorcle-r that the number of degrees oiE teni-- peinture l. etwccii the succiissive control ol the heating iiierliuiiis :may he varieih l prefer to provie the lever 3f-iwith an arljustalile o segr-ees between the operation of the 2U and 20 thus iiie'reaseflor diurnii'iiirts .iii the condition illustrated oil air or other gas entering the and lll"- will maintain the valves 20 arial 20a against the seats 16 euri 1G so thai Qiid compressori air or other gas passes ihrf' 2li and 2i through channels iiito the chambers 19 mil i9, and thence through the channels i8 aiirl i8 and' w' s through the pipe 5l to the calender roi mi. in its passage will Contact with the bulli or sensitive member 470 which extends into the pipe 5l anil thus ii'il'o the path of the exhaust steam. further is such that it will also loe in the path of the lire or high pressure steam when were, fully brought out..

thc teuipcraturc origins to tail thc/iliapiix rui 37 will iiiovc ilow'iiw'arrlly and thus permit the projection 36 to drop, which will causo the lever T' lo swing on its pivot 8.3,

ily by gravity arial partly unilcr (he iiipsr li :ence or the spring' li- As the tempera ture continues to 'fall the emi All of the saiii lever will finally engage and depress the roil 22 and iii consequence will uiove the vulve 120 away from the seat 16 and over the emi of tl'ie.cliaiinel 23 to close the lattei'. iii' this ,moans the tubo lilfwill he cut olli fromy the source of coiiipresserl air or other gas aiul will he thrown iiito coniiiiuiiication with the atmosphere, thus relieving' the diaphragm in the chaniliei l1 from pressure aiifl perniittinii the spring" '14 to open thovalve 9 aiirl live or high pressure steam to4 enter tho 'pijr i 5l through the pipo the valve 9 isvopen as will lie hereinafter and l l to the diaphragm chaiuliers c The position oic said bulli -l-O is the temperature licgi'ins to rise 'again thus again he cui oli^` from the atii'iosphrre aiul again l'ouncrl'eil with the source oiE eoiri`v pressed ais' or other gas which will again depress the oiaqiliragiii iii the chaiulficr llfand thus again close', the valve 91 against the tension of 'the spring 14 and shut off the flow of-,live steam to the pipe 51. Should the temperature continue to vrise'from any cause evcnatter the high pressuresteam has been eut otf then the dia- 4 phragm? will continue to swing the lever 34rand will cause its end 341 to depress thc ner the tube 13 is disconnected from the `the chamber 1t).

source of compressed air or gas and is thrown into 'communicationv with the atmosphere., so that pressure on the diaphragm in the chamber l1 is removed and the valve t) is opened through the medium of thespring 14. The pipe 51 is thus opened to the atmosphere through the exhaust pipe so that a portion at least ot? the exhaust steam passes out through 'the exhaust pipe 52 and consequently does not reach the roll. In consequence the temperature at the bulb 40 will begin to drop and the lever 34 will return to the position shown vin the lrawing and the valve :20 will be moved back to the seat 16 by the pressure of the air or gas in The compressed air or other gas now again passes through the tube 13 and depresses the diaphragm in the chamber 'il and again closes the valve J and thus disconnects the pipe lifrom communication with the atmosphere. Under these conditions the parts will again be in the position ,shown and all ot the exhaust steam will pass through the pipe 51 and to the calender roll.

Should the temperature rise when the parts are as shown in the drawing. the lever Jill will be rocked and its end itt caused to immediately depress the rod 22 tooperate the various parts and cause the valve 9 to be opened as last described above.

It will be seen, that with my invention l overcome by means o't5 a very simple elticien t and inexpensive device all ot the ditlicnltiesI heretofore experienced in the art to which thia application pertains. ln the first place, baring-,I but one thermostatic member. its rations functions will always be performci'l necessivel'i' and in unison at the temperatures at. which they are intended to be per- Atoi-med. ln the second place, the controller can be adjusted to perform the various t'unctions with any number of degrees interveuv ing between them and tbe relation bctuecn the various functions will always remain the same at any tempi-,rature settings.

The invention may be used in many ways as 'tf-r instance as shown in the drawing. in which raid invention is used in connection with is calender roll, used for instance in rubber mills. lt is to be. understood that thisl is only an example et the use to which my improvement may be put and that the same may be utilized in many other ways.

`In large dry rooms it is essential to have a large heating' surface in order to bring the.' tenilxeratnre of the room up to the deslred temperature quickly, and when this rtemperature has been reached, to make it necessary to use only a small portion of the heating surface to maintain the temperature at a substantially fixed point. It is impossible to get any satisfactory control with a single-function controller, for the reason, that, although the controller shutsl otl the steam at the temperature for which it is set, the heat radiating from so large a surface will raise the tempeature many degrees above the desired temperature. This also causes an unnecessary waste of steam.

With my two-function Vcrmtrollers I get perfect control and eliminate the waste of steam, by dividingr the heating coils into two properly proportioned sections and using all the coils to `bring the dry room up to within a few degrees of the desired temperature, then shutting oft' the large section of the heating coil and using the smaller section to keep up the desired temperature. lt is to be understood that the mechanism which controls the val'tes vt'or turning on or shutting oil the heating mediums may be of any type as long as the same is controlled b v a single sensitive member and controls all of the valves.

Various changes in the specific form lshown and described may bc made within the scope of the claims without departing from the spirit of my invention.

T'claim:

1. In a device of the character described, the combination of a main )ipe connected with a source of heat supp y, van exhaust pipe connected with said main pipe, an auxiliary pipe connected with said main pipe and with a second source ot' heatsnpply, a valve in said exhaust'. pipe, a valve 1n said auxiliary pipe, additional valves -connected with each ot' said pipe valves. a single lever adapted to actnate each otI said additional valves` whereby said pipe valvesr are operated and a sensitive member adapted to be affected by the temperature in said main pipe and to actuate said lever.

ln a device, ot' the character described, the combination o'l an element connected with a plurality of sources oll ditl'erent heating mediums, means for controlling the cscape ot one medium vfrom said clement, means for controlling the entry of another medium to said element, a sensitive member. and actuating mechanism common to both controlling means itsclt` controlled by lsaid sensitive member.

it. ln a device ot' the character described. the combination of a main pipe connected me, e ud operated vave for cone "escape of one meum om pipe, f-second fluid 'ogefte valve for ng th enry anohe .meum to 7 sw'. vavee epemtng independa sensitive memer and :an actuating device 'common to bdath of said valves and ltsel controlled by saiifsensitive member.- A

" In testimony whereof I have hereunto 'sein vmy hand.

ALFRED RESCH. 

